CVE-2026-82660

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreHIGH confidence

Score 5.4 from GitHub Security Advisory published 2026-08-31. a secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Nodemailer before 8.0.9 fails to enforce disableFileAccess and disableUrlAccess options during message normalization in jsonTransport. Attackers can read local files or fetch URLs by supplying path or href values in message content fields, bypassing intended access controls.

CVSS v3
5.4
EG Score
5.4(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
9%
KEV
Not listed

Published

August 31, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Aug 31, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Nodemailer jsonTransport bypasses disableFileAccess and disableUrlAccess | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nodemailer-jsontransport-bypasses-disablefileaccess-and-disableurlaccess
github Patch Available🟡 PoC Available

Nodemailer jsonTransport bypasses disableFileAccess and disableUrlAccess during message normalization · Advisory · nodemailer/nodemailer · GitHub

https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wqvq-jvpq-h66f

Vendor Advisories for CVE-2026-82660(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
node-nodemailer6.10.0+~6.4.17-1 ... 9.0.6+~8.0.1-1 (24 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
node-nodemailer6.10.0+~6.4.17-1 ... 9.0.6+~8.0.1-1 (17 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
node-nodemailer6.10.0+~6.4.17-1 ... 8.0.4+~7.0.11-2 (11 versions)8.0.11+~8.0.1-1—
npm(1)
PackageVulnerable rangeFixed inDependents
nodemailer—8.0.9—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 20× in last 7d / 60× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 08:11 UTCEG score recompute
  2. 2026-09-19 08:11 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 09:05 UTCEG score recompute
  5. 2026-09-18 09:05 UTCGHSA enrichment
  6. 2026-09-17 09:59 UTCEG score recompute
  7. 2026-09-17 09:59 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 10:53 UTCEG score recompute
  10. 2026-09-16 10:53 UTCGHSA enrichment
  11. 2026-09-16 05:15 UTCEPSS rescore
  12. 2026-09-15 11:46 UTCEG score recompute
  13. 2026-09-15 11:46 UTCGHSA enrichment
  14. 2026-09-15 03:12 UTCEPSS rescore
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-14 12:40 UTCEG score recompute
  17. 2026-09-14 12:40 UTCGHSA enrichment
  18. 2026-09-13 13:21 UTCEG score recompute
  19. 2026-09-13 13:21 UTCGHSA enrichment
  20. 2026-09-12 14:15 UTCGHSA enrichment
  21. 2026-09-11 15:09 UTCEG score recompute
  22. 2026-09-11 15:09 UTCGHSA enrichment
  23. 2026-09-11 14:53 UTCEPSS rescore
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-10 16:02 UTCEG score recompute
Show 35 more
  1. 2026-09-10 16:02 UTCGHSA enrichment
  2. 2026-09-10 06:53 UTCGHSA enrichment
  3. 2026-09-09 07:47 UTCEG score recompute
  4. 2026-09-09 07:47 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-08 08:40 UTCEG score recompute
  7. 2026-09-08 08:40 UTCGHSA enrichment
  8. 2026-09-07 09:25 UTCEG score recompute
  9. 2026-09-07 09:24 UTCGHSA enrichment
  10. 2026-09-06 13:48 UTCEPSS rescore
  11. 2026-09-06 10:14 UTCEG score recompute
  12. 2026-09-06 10:14 UTCGHSA enrichment
  13. 2026-09-05 15:31 UTCEPSS rescore
  14. 2026-09-05 11:07 UTCEG score recompute
  15. 2026-09-05 11:07 UTCGHSA enrichment
  16. 2026-09-04 12:01 UTCEG score recompute
  17. 2026-09-04 12:01 UTCGHSA enrichment
  18. 2026-09-04 05:07 UTCEPSS rescore
  19. 2026-09-03 12:55 UTCEG score recompute
  20. 2026-09-03 12:54 UTCGHSA enrichment
  21. 2026-09-02 14:12 UTCEPSS rescore
  22. 2026-09-02 13:47 UTCGHSA enrichment
  23. 2026-09-01 14:34 UTCEG score recompute
  24. 2026-09-01 14:34 UTCGHSA enrichment
  25. 2026-09-01 13:54 UTCEPSS rescore
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-09-01 04:40 UTCEPSS rescore
  28. 2026-08-31 15:25 UTCEG score recompute
  29. 2026-08-31 15:24 UTCGHSA enrichment
  30. 2026-08-31 14:45 UTCEG score recompute
  31. 2026-08-31 14:45 UTCGHSA enrichment
  32. 2026-08-31 09:37 UTCEG score recompute
  33. 2026-08-31 09:37 UTCGHSA enrichment
  34. 2026-08-31 08:55 UTCEG score recompute
  35. 2026-08-31 08:52 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-82660?
CVE-2026-82660 is a medium vulnerability published on August 31, 2026. Nodemailer before 8.0.9 fails to enforce disableFileAccess and disableUrlAccess options during message normalization in jsonTransport. Attackers can read local files or fetch URLs by supplying path or href values in message content fields, bypassing intended access controls.
When was CVE-2026-82660 disclosed?
CVE-2026-82660 was first published in the National Vulnerability Database on August 31, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-82660 actively exploited?
CVE-2026-82660 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.2% of all scored CVEs.
What is the CVSS score of CVE-2026-82660?
CVE-2026-82660 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-82660?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-82660, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-82660

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